May 18, 2011 10:32 AM

On occasion over the past 5 months, I have felt pretty weak when running up steeper hills. This morning it happend on a loop that incorporates a long hill (~2 mi). I was quickly winded, but felt ok on the moderate sections. I felt light headed enough to switch to walking on the steepest sections. I felt perfectly fine on the downhill and flat. I have been incorpoating hills for a while including this particular run.

I've been able to do this run in the past with no problems. I don't think I'm short on total calories, but I am begining to suspect a nutritional deficit - perhaps iron/anemia or protein. Thoughts?

It's very hard in the beginning to understand that the whole idea is not to beat the other runners. Eventually you learn that the competition is against the little voice inside you that wants you to quit. ~George Sheehan

Another thing to consider is what you're eating, and when, prior to and during your run. I've had occasions where it was too long between my last meal and my run, and I would sometimes feel a little faint.

hi! I have a quick question: I am pretty sure that I am low on iron (I've had a history of it) and I was thinking I would take a supplement every other day. Did you see a doctor for blood work before you started?

I would get a full cardiac evaluation before you do anything else, just to play it safe. I would then get a good food based multiple-vitamin. Be sure you are fully hydrated till the point of having clear color urine. I would guess one or more of these would be causing the problem.

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